31. Patrick Von Radesky, an engineer with Century Power and Light, earns a gross income of $6,000 per month. Patrick is single, claims one exemption, and uses the standard deduction. Throughout last year, his company withheld S850 each month from his paycheck for federal income tax. Today is January 4. As Patrick's accountant, you just informed him that although his tax return is due at the IRS by April 15, 90% of the income tax due for last year must be paid by January 15; otherwise, a penalty will be imposed. a. Caiculate the amount of tax Patrick owes for the year